M. Balasubramanian, V. Jayabalan and V. Balasubramanian, “Effect of Process Parameters of Pulsed Current Tungsten Inert Gas Welding on Weld Pool Geometry of Titanium Welds,” Acta Metallurgica Sinica (English Letters), Vol. 23, No. 4, 2010, pp. 312-320.
 M. Balasubramanian, V. Jayabalan and V. Balasubramanian, “Optimizing the Pulsed Current Gas Tungsten Arc Welding Parameters,” Journal of Materials Science & Technology, Vol. 22, No. 6, 2006, pp. 821-825.
 G. M. Reddy, A. A. Gokhale and K. P. Rao, “Weld Microstructure Refinement in a 1441 Grade Aluminium- Lithium Alloy,” Journal of Materials Science, Vol. 32, No. 5, 1997, pp. 4117-4126. doi:10.1023/A:1018662126268
 D. K. Zhang and J. T. Niu, “Application of Artificial Neural Network Modeling to Plasma Arc Welding of Aluminum Alloys,” Journal of Advanced Metallurgical Sciences, Vol. 13, No. 1, 2000, pp. 194-200.
 S.-C. Chi and L.-C. Hsu, “A Fuzzy Radial Basis Function Neural Network for Predicting Multiple Quality Characteristics of Plasma Arc Welding,” Joint 9th IFSA World Congress and 20th NAFIPS International Conference, Vancouver, 25-28 July 2001, pp. 2807-2812.
 Y. F. Hsiao, Y. S. Tarng and W. J. Huang, “Optimization of Plasma Arc Welding Parameters by Using the Taguchi Method with the Grey Relational Analysis,” Journal of Materials and Manufacturing Processes, Vol. 23, No. 1, 2007, pp. 51-58. doi:10.1080/10426910701524527
 K. Siva, N. Muragan and R. Logesh, “Optimization of Weld Bead Geometry in Plasma Transferred Arc Hardfacing Austenitic Stainless Steel Plates Using Genetic Algorithm,” The International Journal of Advanced Manufacturing Technology, Vol. 41, No. 1-2, 2008, pp. 24-30. doi:10.1007/s00170-008-1451-3
 A. K. Lakshinarayana, V. Balasubramanian, R. Varahamoorthy and S. Babu, “Predicted the Dilution of Plasma Transferred Arc Hardfacing of Stellite on Carbon Steel Using Response Surface Methodology,” Metals and Materials International, Vol. 14, No. 6, 2008, pp. 779-789. doi:10.3365/met.mat.2008.12.779
 V. Balasubramanian, A. K. Lakshminarayanan, R. Varahamoorthy and S. Babu, “Application of Response Surface Methodolody to Prediction of Dilution in Plasma Transferred Arc Hardfacing of Stainless Steel on Carbon Steel,” International Journal of Iron and Steel Research, Vol. 16, No. 1, 2009, pp. 44-53.
 N. Kahraman, M. Taskin, B. Gulenc and A. Durgutlu, “An Investigation into the Effect of Welding Current on the Plasma Arc Welding of Pure Titanium,” Kovove Mater, Vol. 48, No. 3, 2010, pp. 179-184.
 N. Srimath and N. Muragan, “Prediction and Optimization of Weld Bead Geometry of Plasma Transferred Arc Hardfacing Valve Seat Rings,” European Journal of Scientific Research, Vol. 51, No. 2, 2011, pp. 285-298.
 K. S. Prasad, Ch. S. Rao and D. N. Rao, “Prediction of Weld Pool Geometry in Pulsed Current Micro Plasma Arc Welding of SS304L Stainless Steel Sheets,” International Transaction Journal of Engineering Management & Applied Sciences & Technologies, Vol. 2, No. 3, 2011, pp. 325-336.